JP2017008671A - Precast bridge component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precast bridge component, which can be easily transported and carried in and easily connected to a floor slab of a precast wall bridge railing.SOLUTION: A PCa bridge component 10 comprises: a PCa floor slab member 11; and a PCa bridge railing member 12, which is connected to an end of the PCa floor slab member 11 in a bridge width direction. The PCa bridge railing member 12 is connected to the PCa floor slab member 11 by hinge so that the PCa bridge railing member can be positioned at a folding position where the PCa bridge railing member extends along the PCa floor slab member 11 above the PCa floor slab member 11 and an expansion position where the PCa bridge railing member extends along vertical direction and faces a side end part of the PCa floor slab member 11.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a precast bridge member having a precast wall rail.

  In bridges, wall rails are usually provided at both ends in the bridge width direction of the slab (in the direction perpendicular to the bridge axis). The wall rail is generally constructed by cast-in-place construction after slab construction. On the other hand, for the purpose of shortening the construction period, the wall rails are prefabricated with precast concrete, and after the floor slab is installed, the precast wall rails are placed on the floor slab and the concrete is placed at the connection with the floor slab. Thus, a wall rail attachment structure or attachment method (for example, Patent Documents 1 and 2) that is joined to a floor slab is known. Also known is a mounting structure (for example, Patent Document 3) in which a wall rail and a ground block are precast and the ground block and the wall rail arranged on the floor slab are connected using a PC steel wire for connection. ing. Furthermore, it functions as a formwork, and after the concrete is placed, an installation method using an embedded formwork (partial precast member) that forms a wall rail integrally with the placed concrete (for example, Patent Document 4, 5) etc. exist (for example, refer to Patent Document 1).

Japanese Patent No. 2859158 JP2013-36205A JP 2002-146721 A Japanese Patent No. 3197235 JP 2013-57215 A

  However, all of the above conventional techniques require that the precast rail member be carried onto the floor slab after the floor slab is installed, and that the rail member be connected to the floor slab by the respective connecting methods, and the conveyance and carry-in operations are complicated. In addition, when joining the handrail member to the floor slab, it is difficult to position, and work on the outside of the handrail or below the floor slab is necessary, that is, a work scaffold is required. The joining operation of the members is also complicated.

  In view of such a background, an object of the present invention is to provide a precast bridge member that is easy to carry and carry in and that can be easily joined to a floor slab of a precast wall rail.

  In order to solve such problems, the present invention provides a precast bridge member (10), which is a precast floor slab member (11) and a precast joined to an end of the precast floor slab member in the bridge width direction. A wall rail member (12), wherein the precast wall rail member extends above the precast floor slab member along the precast floor slab member, and extends along a vertical direction, It is set as the structure couple | bonded with the said precast floor slab member so that the expansion | deployment position which opposes the side edge part of a precast floor slab member can be taken.

  According to this configuration, since the precast wall rail member is hinge-coupled to the precast floor slab member, the precast floor slab member and the precast wall rail member can be transported or carried in (built). is there. Further, since the precast wall rail member can take the folding position, it is possible to stack a plurality of precast bridge members on the transport vehicle, and the transport and carry-in operations are easy. Furthermore, since the precast wall rail member can take the unfolded position, the positioning of the precast wall rail member with respect to the precast floor slab member is easy, and the joining work is facilitated.

  Further, the present invention is the above-described configuration, wherein the precast wall rail member (12) is formed by integrally forming a wall rail (2) and an end (1b) of the floor slab (1). When the rail member is in the unfolded position, a filler filling groove (42) opening upward is formed between the precast floor slab member (11) and the precast wall rail member, and the filler filling groove (42 ) Are formed integrally with at least one of the precast floor slab member (11) and the precast wall rail member.

  According to this configuration, the bottom wall forms the bottom surface of the filling material filling groove, and the filling material filling groove opens upward. Therefore, it is not necessary to separately provide a filling form, and filling work is easy. Further, it is possible to perform the bar arrangement work in the filling material filling groove and the filling work into the filling material filling groove on the floor slab. Therefore, it is easier to join the precast wall rail member.

  Further, the present invention is the above-described configuration, wherein the precast wall rail member (12) has a shape in which a lower portion of the wall rail (2) is cut out, and when the precast wall rail member is in the deployed position, A filler filling groove (72) opening inward in the bridge width direction is formed between the precast floor slab member (11) and the precast wall rail member to form a bottom surface of the filler filling groove (72). The bottom wall (62) may be formed integrally with at least one of the precast floor slab member (11) and the precast wall rail member.

  According to this configuration, since the bottom wall forms the bottom surface of the filler filling groove and the filler filling groove opens inward in the bridge width direction, the inner mold for filling is required, but the outer mold is There is no need to provide it separately. Moreover, the formwork assembling work, the bar arrangement work in the filling material filling groove, and the filling work into the filling material filling groove can be performed on the floor slab. Therefore, it is easier to join the precast wall rail member. Furthermore, the height dimension of the precast bridge member when the precast wall rail member is in the folded position can be reduced.

  In the above-described configuration, the present invention provides a hinge coupling member (13) for coupling the precast floor slab member (11) and the precast wall rail member (12), wherein the precast wall rail member is at the deployed position. It is good to set it as the structure arrange | positioned inside the said filling material filling groove | channel (42, 72) at a certain time.

  According to this configuration, the filler can be filled into the filler filling groove while the precast floor slab member and the precast wall rail member are hinge-coupled. Therefore, it is not necessary to perform an operation of removing the hinge coupling member or an operation of fixing the precast wall rail member at the hinge coupling portion, and the joining operation is easy.

  Further, according to the present invention, in the above configuration, the hinge coupling member (13) includes a first hinge member (25) provided integrally with the precast floor slab member (11), and the precast wall rail member (12). A second hinge member (35) provided integrally with a shaft member (37) inserted into a hole provided in the first and second hinge members, and one of the first and second hinge members. It is preferable that the hole is a long hole.

  According to this configuration, the position of the precast wall rail member in the deployed position can be adjusted. Therefore, even if an installation error occurs during the installation of the precast bridge member, the installation error can be absorbed at the position of the precast wall rail member.

  Moreover, this invention is the above-mentioned structure. WHEREIN: The said precast floor slab member (11) is extended inside the said filler filling groove | channel (42, 72), and the said expansion | deployment position of the said precast wall rail member (12) A restriction member (27) for restricting movement to the side may be integrally provided.

  According to this configuration, when the precast wall rail member is deployed, the precast wall rail member can be prevented from colliding with the precast floor slab member and being damaged.

  Further, according to the present invention, in the above configuration, the regulating member (27) is attached to the rod-shaped member (27a) integrally provided on the precast floor slab member (11) and displaceably attached to a tip of the rod-shaped member. And a position adjusting member (27b) that contacts the precast wall rail member (12) and adjusts the position of the precast wall rail member.

  According to this configuration, the position of the precast wall rail member can be easily adjusted by changing the position of the position adjusting member.

  Further, the present invention provides the above-described configuration, wherein the precast floor slab member (11) and the precast wall rail member (12) are connected to the reinforcing bars (42, 72) disposed inside the filler filling grooves (42, 72). 26, 36) may be provided integrally.

  According to this configuration, since it is not necessary to connect the reinforcing bars in the bridge width direction to the precast floor slab member and the precast wall rail member after the precast wall rail member is arranged at the unfolded position, the bar arrangement work for joining is easy. .

  As described above, according to the present invention, it is possible to provide a precast bridge member that is easy to carry and carry in and that can be easily joined to a floor slab of a precast wall rail.

Front view of a folded PCa bridge member according to the first embodiment Enlarged view of the main part of the PCa bridge member shown in FIG. Enlarged view of the main part of the expanded PCa bridge member The principal part enlarged view of the PCa bridge member in the state where the PCa rail member is joined V arrow view in FIG. The figure which shows the load figure at the time of conveyance of the PCa bridge member shown in FIG. Front view of the folded PCa bridge member according to the second embodiment Enlarged view of the main part of the expanded PCa bridge member Enlarged view of main parts of PCa bridge member before filling with filler The principal part enlarged view of the PCa bridge member in the state where the PCa rail member is joined

  Hereinafter, embodiments of a precast bridge member according to the present invention will be described in detail with reference to the drawings. In the drawings, some of the members provided in the concrete are indicated by solid lines as if they were seen through the concrete.

<< First Embodiment >>
First, a first embodiment will be described with reference to FIGS. As shown in FIG. 1, the precast bridge member (hereinafter referred to as PCa bridge member 10) has a long shape in the horizontal direction (hereinafter referred to as the bridge width direction) perpendicular to the bridge axis, and is bridged between the piers. A plurality of unillustrated (four in this embodiment) main girder are installed side by side in the bridge axis direction to constitute a floor slab 1 and a wall height column 2 (see FIG. 4) of the girder bridge. The PCa bridge member 10 may be made of reinforced concrete (RC) or prestressed concrete (PC), and is manufactured in advance in a factory and transported to the site. Girder bridges whose superstructure is composed of PCa bridge member 10, main girder, cross girder, etc. are girder bridges (composite bridges) whose main girder is an I-shaped girder, and box girder whose main girder is steel It may be a box girder bridge (composite bridge) composed of a PC girder (a concrete bridge) whose main girder is composed of a PC girder. Girder bridges are used as road bridges, railway bridges, aqueducts, and pedestrian bridges. The PCa bridge member 10 may be used when a girder bridge is newly established, or may be used when a girder bridge is replaced.

  The PCa bridge member 10 is a pair of a rectangular plate-shaped precast floor slab member (hereinafter referred to as a PCa floor slab member 11) that is long in the bridge width direction and a hinge-coupled end of the PCa floor slab member 11 in the bridge width direction. A precast wall rail member (hereinafter referred to as PCa rail member 12). FIG. 1 shows a state where the PCa rail member 12 is in a folding position extending in the bridge width direction along the PCa floor slab member 11 above the PCa floor slab member 11 (hereinafter referred to as a folded state). The folded state is taken when the PCa bridge member 10 manufactured in the factory is transported to the site. Further, the PCa bridge member 10 transported to the site may be in a folded state when it is carried (installed) on the main girder directly from the transport vehicle 52 (FIG. 6) or temporarily placed in the yard.

  The PCa floor slab member 11 has a width that forms most of the central portion 1a excluding both ends in the bridge width direction of the floor slab 1 (see FIG. 4). The length of the PCa floor slab member 11 in the direction of the bridge axis is set to 3.2 m or less so that the public road can be transported by a vehicle, and is set to 3.0 m in this embodiment. The upper surface of the PCa floor slab member 11 is a flat surface, and four thickened portions 12a are formed on the lower surface of the PCa bridge member 10 at positions corresponding to the main girders.

  The PCa balustrade member 12 includes one end 1b (see FIG. 4) in the bridge width direction of the floor slab 1 and a wall height column 2 (see FIG. 4) erected on the edge of the floor slab 1 in the bridge width direction. All of them are integrally formed. In the folded state, the PCa balustrade member 12 is supported by the hinge coupling member 13 and the gantry 14 disposed on the PCa floor slab member 11 and is fixed to the PCa floor slab member 11 by its own weight. . The length of the PCa rail member 12 in the bridge axis direction is the same as that of the PCa floor slab member 11.

  The detailed structure of the PCa floor slab member 11 and the PCa rail member 12 and the structure of these hinge coupling members 13 will be described with reference to FIG. 2 is an enlarged view of the main part (right part) of FIG. 1. The imaginary line in FIG. 2 is a side end of the PCa floor slab member 11 in which the PCa rail member 12 shown by a solid line is developed and extends vertically. The state (henceforth a development | deployment state) in the deployment position which opposes the end surface of a part is shown.

  The PCa floor slab member 11 is composed of a plate-like floor slab main part 21 constituting the entire thickness of the floor slab 1 and a lower part of the end face in the bridge width direction of the floor slab main part 21 directed outward in the bridge width direction. And an inner floor slab lower wall 22 that protrudes. A backup material 45 is affixed to the tip of the inner floor slab lower wall 22. A first hinge member 25 made of a steel plate is integrally provided on the floor slab main portion 21 so as to protrude outward in the bridge width direction from the end face. The first hinge member 25 extends in the vertical direction, and a long hole (not shown) extending in the bridge width direction passes through the first hinge member 25 in a portion protruding from the floor slab main portion 21. Is formed. The first hinge member 25 is provided at two locations that are separated from each other in the bridge axis direction of the PCa floor slab member 11. The floor slab main portion 21 is integrally provided with a connecting reinforcing bar 26 so as to protrude outward from the end face in the bridge width direction. The connecting reinforcing bars 26 are constituted by a plurality of loop bars arranged at predetermined intervals in the bridge axis direction.

  As shown in FIG. 3, a restriction member 27 for restricting movement of the PCa rail member 12 toward the unfolded position side protrudes outward from the end face in the bridge width direction on the floor slab main portion 21. Are integrally provided. The regulating member 27 is a rod-shaped member 27a made of a steel rod having a male screw formed at least at the tip, and is screwed to the tip of the rod-shaped member 27a and abuts against the PCa rail member 12 to thereby bridge the bridge width of the PCa rail member 12. It is comprised by the long nut 27b which controls the movement to the inward of a direction. The long nut 27b is displaced in the axial direction of the rod-shaped member 27a by rotating around the rod-shaped member 27a, and also functions as a position adjusting member for adjusting the position of the PCa rail member 12. The restricting member 27 is provided at two locations spaced apart in the bridge axis direction of the PCa floor slab member 11.

  As shown in FIG. 2, an insert nut 28 is embedded at a position spaced inward in the bridge width direction from the edge on the upper surface of the floor slab main portion 21.

  The PCa balustrade member 12 includes a block-shaped floor slab end 31 constituting the entire thickness of the floor slab 1 and a lower portion of the inner surface of the floor slab end 31 in the bridge width direction (based on a developed state. The same applies unless otherwise noted.) Outer floor slab lower wall 32 projecting inward in the bridge width direction, and a balustrade projecting upward from the outside in the bridge width direction on the upper surface of the floor slab end 31 Part 33. The balustrade section 33 has a tapered shape in which the wall thickness increases toward the lower side, and a ground cover section 34 protruding inward in the bridge width direction is integrally formed at the lower portion.

  A pair of second hinge members 35 made of a steel plate are integrally provided on the floor slab end portion 31 so as to protrude inward in the bridge width direction from the inner surface. The second hinge member 35 extends in the vertical direction and is disposed so as to face each other with an interval substantially equal to the thickness of the first hinge member 25. A through hole (not shown) having a circular cross section is coaxially formed in each of the portions of the second hinge member 35 protruding from the floor slab end portion 31. The pair of second hinge members 35 are provided at two locations on the PCa rail member 12 corresponding to the first hinge member 25. The floor slab end 31 is integrally provided with a connecting reinforcing bar 36 so as to protrude inward in the bridge width direction from the inner surface. The connecting reinforcing bars 36 are configured as a plurality of loop bars arranged at predetermined intervals in the bridge axis direction.

  With the first hinge member 25 disposed between the pair of second hinge members 35, bolts 37 are inserted as shaft members into the long holes of the first hinge member 25 and the through holes of the second hinge member 35. A nut (not shown) is screwed onto the bolt 37 to prevent the bolt 37 from coming off. As described above, the hinge coupling member 13 is configured by the first hinge member 25, the second hinge member 35, and the bolt 37, and the PCa rail member 12 is configured by the hinge coupling member 13 so that the folding position and the deployed position can be taken. It is hinged to the floor slab member 11. In a state where the bolt 37 and the nut are loose, the PCa rail member 12 can rotate around the bolt 37 and move horizontally along the elongated hole. On the other hand, when the bolt 37 and the nut are fastened, the rotational movement and horizontal movement of the PCa rail member 12 are prevented.

  Insert nuts 38 and 39 are embedded in the upper part of the inner surface of the balustrade part 33 and the upper surface of the floor slab end part 31. The PCa balustrade member 12 is deployed (rotated) to the deployed position by attaching a hanging bracket 41 to the insert nut 38 of the balustrade section 33 and lifting it with a crane via the hanging bracket 41. The deployment of the PCa rail member 12 may be performed in a temporary yard before the PCa bridge member 10 is installed on the main girder, or may be performed after the PCa bridge member 10 is installed on the main girder. . Since the PCa rail member 12 is relatively light, when the PCa rail member 12 is deployed after the PCa bridge member 10 is installed on the main girder, it is prepared separately from the crane for installing the PCa bridge member 10. A small crane may be placed on the girder bridge, and the PCa rail member 12 may be deployed using this crane. Alternatively, the PCa rail member 12 may be developed using a jack, a dedicated push-up device, a chain block, or the like.

  FIG. 3 shows a state in which the PCa rail member 12 is expanded. In this unfolded state, a bottomed filler filling groove 42 that opens upward is formed between the PCa floor slab member 11 and the PCa rail member 12. The bottom surface of the filling material filling groove 42 is formed by an inner floor slab lower wall 22 protruding from the PCa floor slab member 11 and an outer floor slab lower wall 32 protruding from the PCa rail member 12. That is, the inner floor slab lower wall 22 and the outer floor slab lower wall 32 are the bottom walls of the filler filling groove 42. A gap between the outer floor slab lower wall 32 and the inner floor slab lower wall 22 is closed by a backup material 45. In the expanded state, the connecting reinforcing bars 26 and 36 provided on the PCa floor slab member 11 and the PCa rail member 12 are disposed inside the filler filling groove 42. Further, the hinge coupling member 13 (see FIG. 4) and the regulating member 27 are also arranged inside the filler filling groove 42.

  The rotational movement of the PCa rail member 12 is blocked by the hinge coupling member 13 when the bolt 37 and the nut are fastened, but the hinge coupling member when the bolt 37 and the nut are loosened to deploy the PCa rail member 12. 13 is not blocked. Therefore, there is a possibility that one or both of the outer floor slab lower walls 32 may collide with the inner floor slab lower wall 22 and be damaged when the PCa rail member 12 is deployed. In this embodiment, since the regulating member 27 is integrally provided on the PCa floor slab member 11, the regulating member 27 is placed on the PCa rail member 12 at a position where the outer floor slab lower wall 32 does not collide with the inner floor slab lower wall 22. The long nut 27b is rotated to adjust the length of the restricting member 27 so as to abut and restrict the rotational movement.

  After the left and right PCa rail member 12 is expanded, the position of the PCa rail member 12 is adjusted. Since a long hole that is long in the bridge width direction is formed in the first hinge member 25, the PCa rail member 12 can be moved horizontally in the bridge width direction. The position of the PCa rail member 12 is adjusted so that the effective width between the ground cover portions 34 formed integrally with the left and right rail portions 33 is not less than the design dimension. In addition, when the deployment work of the PCa rail member 12 is performed after the PCa bridge member 10 is erected, the PCa bridge member 10 is adjusted so that it matches the rail 33 of the PCa bridge member 10 previously erected.

  In conjunction with the horizontal position adjustment, the inclination adjustment of the PCa rail member 12 and the outward displacement prevention in the bridge width direction are performed. As shown in the figure, for example, the jig 43 is attached to the insert nuts 28, 38, 39 embedded in the floor slab main part 21, the balustrade part 33 and the floor slab end 31, and a lever block (registered trademark) is shown. This is done by fixing the distance between the jigs using 44 or the like. After the position of the PCa rail member 12 is fixed, the bridge axis direction reinforcing bar 46 is arranged inside the filler filling groove 42 (inside the looped connecting reinforcing bars 26, 36, etc.).

  Thereafter, as shown in FIG. 4, a filler 47 is filled into the filler filling groove 42. The steel hinge coupling member 13 and the regulating member 27 (FIG. 3) are buried in the filler 47, respectively. The filler 47 may be a cement filler such as concrete or mortar. As a result, the PCa rail member 12 is joined (integrated) to the PCa floor slab member 11. After the filling material 47 is cured, the lever block 44 and the jig 43 are removed and used in the joining work of the PCa bridge member 10 to be installed next.

  Note that the PCa bridge member 10 is also connected to the PCa bridge member 10 installed in advance using a known method. In many cases, concrete is placed in the connecting portion of the floor slab 1, and in this case, the number of times of placing concrete is reduced by placing concrete in the filler filling groove 42 as the filler 47 simultaneously with the connecting concrete. Is done.

  On the other hand, the balustrades 33 are connected as follows. That is, as shown in FIG. 5, the shear key 48 is formed in advance on the bridge axial direction end surfaces of the adjacent balustrades 33. Moreover, the backup material 49 is affixed in advance along the inner surface and outer surface in the bridge width direction on one or both of the rail sections 33 in the bridge axis direction. In a state in which the PCa bridge member 10 is installed on the main girder, and the PCa rail member 12 is expanded and joined to the PCa floor slab member 11, the rail portion 33 adjacent to the bridge axis direction faces with a predetermined gap. The both ends inside and outside the gap are closed by the backup material 49. In this state, the entire gap including the shear key 48 is filled with a filler 50 such as mortar. Thereby, the balustrade parts 33 and 33 are connected.

  As described above, a plurality of PCa bridge members 10 are sequentially installed on the main girder and connected to the previously installed PCa bridge member 10, whereby the floor slab 1 and the wall height column 2 of the girder bridge are constructed.

  As shown in FIG. 1, the PCa bridge member 10 configured as described above includes a PCa floor slab member 11 and a PCa rail member 12 so that the PCa rail member 12 can take a folded position and an open position. By being hinge-coupled to the PCa floor slab member 11, the PCa floor slab member 11 and the PCa balustrade member 12 can be transported or carried in (built). In addition, since the PCa rail member 12 can take the folding position, as shown in FIG. 6, a plurality of PCa bridge members 10 are stacked in a plurality of stages up and down via a sleeper 51 such as I-shaped steel. It can be loaded on the transport vehicle 52, and transport and carry-in operations are easy. Furthermore, since the PCa balustrade member 12 can take the unfolded position, the positioning of the PCa balustrade member 12 with respect to the PCa floor slab member 11 is easy, and the joining operation becomes easy.

  In the present embodiment, as shown in FIG. 3, the PCa rail member 12 integrally forms the wall rail 2 and the end 1b of the floor slab 1, and when the PCa rail member 12 is in the deployed position, the PCa A filler filling groove 42 that opens upward is formed between the floor slab member 11 and the PCa rail member 12, and the inner floor slab lower wall 22 and the outer floor slab lower wall 32 that form the bottom surface of the filler filling groove 42 are formed. Since at least one is integrally formed with the PCa floor slab member 11 or the PCa balustrade member 12, it is not necessary to separately provide a filling mold, and the filling work of the filler 47 is also easy. Further, it is possible to perform the bar arrangement work in the filler filling groove 42 and the filling work of the filler 47 into the filler filling groove 42 on the floor slab 1. Thereby, joining operation of the PCa rail member 12 becomes easier.

  Further, as shown in FIG. 4, the hinge coupling member 13 is disposed inside the filler filling groove 42 so that the PCa floor slab member 11 and the PCa balustrade member 12 remain hinge-coupled. 47 can be filled into the filler filling groove 42. That is, it is not necessary to perform the operation of removing the hinge coupling member 13 or the operation of fixing the PCa rail member 12 at the hinge coupling portion, and the joining operation is easy.

  Moreover, in this embodiment, the hinge coupling member 13 is connected to the first hinge member 25 provided on the PCa floor slab member 11, the second hinge member 35 provided on the PCa rail member 12, and both the hinge members 25, 35. It is possible to adjust the position of the PCa rail member 12 in the unfolded position by including a bolt 37 inserted into the provided hole and one of the hinge members 25 and 35 being a long hole. Therefore, even if an installation error occurs during the installation of the PCa bridge member 10, the installation error can be absorbed at the position of the PCa rail member 12.

  As shown in FIG. 3, the PCa floor slab member 11 integrally includes a regulating member 27 that extends inside the filler filling groove 42 and regulates the movement of the PCa rail member 12 toward the deployment position. This prevents the PCa rail member 12 from colliding with the PCa floor slab member 11 and being damaged when the PCa rail member 12 is deployed.

  Further, a restricting member 27 is attached to the end of the bar-shaped member 27a integrally provided on the PCa floor slab member 11 and the bar-shaped member 27a so as to be displaceable. By having the long nut 27b to be adjusted, the position of the PCa rail member 12 can be easily adjusted by changing the position of the long nut 27b.

  In addition, the PCa floor slab member 11 and the PCa balustrade member 12 are integrally provided with connecting reinforcing bars 26 and 36 arranged inside the filler filling groove 42, so that the bridge after the PCa balustrade member 12 is arranged at the unfolded position. Since it is not necessary to connect the reinforcing bars in the width direction to the PCa floor slab member 11 and the PCa balustrade member 12, the bar arrangement work for joining is easy.

<< Second Embodiment >>
Next, a second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the element which is the same or the same as that of 1st Embodiment, or a function, and the overlapping description is abbreviate | omitted.

  In the PCa bridge member 10 of the present embodiment, the PCa floor slab member 11 has the same width as the entire width of the floor slab 1 and constitutes the entire bridge width direction of the floor slab 1. On the other hand, the PCa rail member 12 has a shape in which the inner side of the lower portion of the wall rail 2 erected on the edge of the floor slab 1 in the bridge width direction is cut out.

  A first hinge member 25 is integrally provided on the PCa floor slab member 11 so as to protrude upward from the upper surface of the end portion. The first hinge member 25 extends in the bridge width direction, and a long hole (not shown) extending in the vertical direction is formed through the portion protruding from the PCa floor slab member 11. Further, the PCa floor slab member 11 is integrally provided with a connecting reinforcing bar 26 and a regulating member 27 so as to protrude upward from the upper surface of the end portion. A backup material 45 is attached to the edge in the bridge width direction on the upper surface of the PCa floor slab member 11.

  The PCa balustrade member 12 has a balustrade main portion 61 constituting the entire wall thickness at the upper portion of the wall balustrade 2 and a taper shape that protrudes downward from the lower surface of the balustrade main portion 61 and becomes thinner toward the lower side. 2 and a balustrade outer wall 62 constituting an outer portion in the bridge width direction. A pair of second hinge members 35 are integrally provided on the PCa rail member 12 so as to protrude generally downward from the tapered surface of the rail outer wall 62. Further, the PCa rail member 12 is integrally provided with a connecting rebar 36 so as to protrude substantially downward from the tapered surface of the rail outer wall 62.

  The PCa rail member 12 is arranged in the bridge width direction along the PCa floor slab member 11 above the PCa floor slab member 11 by the hinge coupling member 13 constituted by the first hinge member 25, the second hinge member 35 and the bolt 37. Hinged to the PCa floor slab member 11 so that a folding position indicated by a solid line extending and a development position indicated by an imaginary line extending vertically and facing the upper surface of the side end of the PCa floor slab member 11 can be taken. Has been.

  FIG. 8 shows a state in which the PCa rail member 12 is developed. In this expanded state, a bottomed filler filling groove 72 that opens inward in the bridge width direction is formed between the PCa floor slab member 11 and the PCa rail member 12. The bottom surface of the filler filling groove 72 is formed by a balustrade outer wall 62 formed to protrude from the PCa balustrade member 12. That is, the balustrade outer wall 62 is the bottom wall of the filler filling groove 72. The gap between the balustrade outer wall 62 and the PCa floor slab member 11 is closed by the backup material 45.

  In the present embodiment, since a long hole that is long in the vertical direction is formed in the first hinge member 25 (FIG. 7), the PCa rail member 12 can move in the vertical direction. Therefore, in the position adjustment of the PCa rail member 12 performed after deployment of the left and right PCa rail members 12, the position of the PCa rail member 12 passes through the height of the PCa bridge member 10 previously installed with the PCa rail member 12. To be adjusted. In addition, the tilt adjustment of the PCa rail member 12 is performed together with the vertical position adjustment. As shown in the figure, this work is performed by attaching a jig 43 to the insert nuts 28 and 38 embedded in the PCa floor slab member 11 and the PCa rail member 12, and fixing the distance between the jigs. After the position of the PCa rail member 12 is fixed, the bridge axis direction reinforcing bar 46 is disposed inside the filler filling groove 72 (inside the looped connecting reinforcing bars 26, 36, etc.).

  Moreover, as shown in the drawing, sheaths 74 and 75 extending in the vertical direction are provided inside the PCa floor slab member 11 and the PCa rail member 12, and both sheaths 74 and 75 arranged linearly in the deployed state. A PC steel rod 76 may be inserted therein, and prestress may be introduced after the filler 47 (FIG. 10) is cured. In this case, the embedded anchor plate 77 in which the female screw is formed is embedded in the lower surface of the PCa floor slab member 11 so as to be connected to the lower end of the sheath 74 on the PCa floor slab member 11 side, and is inserted from the upper surface of the PCa balustrade member 12. The male screw formed at the lower end of the PC steel rod 76 is screwed into the embedded anchor plate 77. By setting it as such a structure, the operation | work under the PCa floor slab member 11 which requires a scaffold does not generate | occur | produce. The embedded anchor plate 77 may be covered with an epoxy powder coating cap 78 and filled with a filler such as wax to provide a rust preventive treatment and reduce the maintenance burden. On the other hand, a recessed portion 61a is formed on the upper surface of the balustrade main portion 61 so that the embedded anchor plate 79 fixing the upper end of the PC steel rod 76 is not exposed to the outside, and the embedded anchor plate 79 is disposed at the bottom of the recessed portion 61a. .

  As shown in FIG. 9, both the sheaths 74 and 75 are connected by a connecting sheath 80 before the inner mold 73 is assembled. After the inner mold 73 for filling is assembled, the filler 47 is filled into the filler filling groove 42. As shown in FIG. 10, after the filler 47 is cured, the mold is removed from the mold, and the PC steel bar 76 is tensioned on the upper surface of the PCa rail member 12 by using a tension jack (not shown) and fixed to the embedded anchor plate 79. Thereafter, grout is injected into the sheaths 74, 75, and 80, and the concave portion 61a is filled with a filler 81 and a waterproof film 82 is formed to perform waterproofing. As a result, the PCa rail member 12 is joined (integrated) to the PCa floor slab member 11. Note that the use of the PC steel rod 76 is optional, and the PCa rail member 12 may be joined to the PCa floor slab member 11 only by the filler 47 filled in the filler filling groove 72.

  Thus, in the PCa bridge member 10 of the present embodiment, as shown in FIG. 9, the PCa rail member 12 has a shape in which the lower part of the wall rail 2 is cut out, and when the PCa rail member 12 is in the unfolded position, A filler filling groove 72 that opens inward in the bridge width direction is formed between the PCa floor slab member 11 and the PCa balustrade member 12, and a rail outer wall 62 that forms the bottom surface of the filler filling groove 72 is a PCa floor slab member 11 and the PCa rail member 12 are integrally formed. Thereby, it is not necessary to separately provide an outer mold for filling. Further, on the floor slab 1, it is possible to perform a form assembly operation, a bar arrangement operation in the filler filling groove 42, and a filling operation of the filler 47 into the filler filling groove 42. Therefore, the joining work of the PCa rail member 12 becomes easier.

  The description of the specific embodiments is finished as described above, but the present invention is not limited to these embodiments, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the PCa floor slab member 11 constitutes the entire width of the floor slab 1, but the PCa floor slab member 11 is divided in the bridge width direction and is provided at the end in the bridge width direction. The PCa bridge member 10 may be configured by the plate member 11 and one PCa rail member 12 hinged to the plate member 11. On the other hand, all the components of the PCa bridge member 10 according to the present invention shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Floor slab 1b Edge part 2 Wall rail 10 PCa bridge member 11 PCa floor member 12 PCa rail member 13 Hinge coupling member 22 Inner floor slab lower wall (bottom wall)
25 First hinge member 26 Connecting reinforcing bar 27 Restricting member 27a Bar-shaped member 27b Long nut (position adjusting member)
32 Outer floor slab lower wall (bottom wall)
35 Second hinge member 36 Connecting bar 37 Bolt (shaft member)
42 Filling material filling groove 62 Handrail outer wall
72 Filling groove

Claims (8)

A precast bridge member,
A precast floor slab member, and a precast wall rail member joined to an end of the precast floor slab member in the bridge width direction,
The precast wall rail member extends along the vertical position above the precast floor slab member along the precast floor slab member, and extends along the vertical direction, and faces the side end of the precast floor slab member. A precast bridge member, wherein the precast bridge member is hinged to the precast floor slab member so as to be able to take a developed position. The precast wall rail member is formed integrally with the wall rail and the end of the floor slab,
When the precast wall rail member is in the unfolded position, a filler filling groove that opens upward is formed between the precast floor slab member and the precast wall rail member,
2. The precast bridge member according to claim 1, wherein a bottom wall forming a bottom surface of the filler filling groove is formed integrally with at least one of the precast floor slab member and the precast wall rail member. The precast wall rail member has a shape in which the lower part of the wall rail is cut out,
When the precast wall rail member is in the unfolded position, a filler filling groove that opens inward in the bridge width direction is formed between the precast floor slab member and the precast wall rail member,
2. The precast bridge member according to claim 1, wherein a bottom wall forming a bottom surface of the filler filling groove is formed integrally with at least one of the precast floor slab member and the precast wall rail member.   The hinge coupling member that couples the precast floor slab member and the precast wall rail member is disposed inside the filler filling groove when the precast wall rail member is in the unfolded position. The precast bridge member according to claim 2 or claim 3.   The hinge coupling member is provided on the first hinge member integrally provided on the precast floor slab member, the second hinge member integrally provided on the precast wall rail member, and the first and second hinge members. The precast bridge member according to claim 4, further comprising: a shaft member inserted into the hole, wherein one of the first and second hinge members is a long hole.   The precast floor slab member is integrally provided with a regulating member that extends into the filler filling groove and regulates the movement of the precast wall rail member toward the deployment position. The precast bridge member according to claim 5.   The restricting member is attached to the precast floor slab member integrally with the rod-shaped member, and is displaceably attached to the tip of the rod-shaped member, and abuts on the precast wall rail member to adjust the position of the precast wall rail member The precast bridge member according to claim 6, further comprising a position adjusting member that performs the adjustment.   8. The precast according to claim 2, wherein each of the precast floor slab member and the precast wall rail member is integrally provided with a connecting reinforcing bar disposed inside the filler filling groove. Bridge member.

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